Stamping Parts 9
Application of stamping parts
1. Electrical parts stamping plant. This kind of factory is a new industry, which develops with the development of electrical appliances. These factories are mainly concentrated in the south.
2. Automobile and other industries parts stamping. It is mainly formed by punching and shearing. Many of these enterprises belong to standard parts factories and some independent stamping plants. At present, there are many small factories around some automobile factories or tractor factories.
3. Stamping in the automotive industry. Drawing is the main method. In China, this part is mainly concentrated in automobile factories, tractor factories, aircraft manufacturers and other large factories, and independent large-scale stamping and drawing plants are rare.
4. Daily necessities stamping factory. Some handicrafts, tableware and so on, these factories also have the big development in recent years.
5. Special stamping enterprises. For example, the stamping of aviation parts belongs to this kind of enterprise, but these process factories are also included in some large factories.
6. Stamping plant for household electrical parts. These factories appeared only after the development of household appliances in China, and most of them are distributed in household appliance enterprises.
Technical requirements for metal stamping parts
1. Chemical analysis and metallographic examination are used to analyze the content of chemical elements in the materials, determine the grade and uniformity of grain size, evaluate the grade of free cementite, banded structure and non-metallic inclusions in the material, and check the defects such as shrinkage cavity and porosity. 2. Material inspection the processing materials of stamping parts are mainly hot-rolled or cold-rolled (mainly cold-rolled) metal sheet and strip materials. The raw materials of metal stamping parts shall be provided with quality certificates to ensure that the materials meet the specified technical requirements. When there is no quality certificate or for other reasons, the hardware stamping parts manufacturer can select raw materials for re inspection according to the needs. A kind of
3. The formability test includes bending test, cupping test, determination of work hardening index n and plastic strain ratio R. in addition, the formability test method of steel sheet can be carried out according to the regulations of formability and test method of sheet steel. A kind of
4. Hardness test the hardness of metal stamping parts is tested by Rockwell hardness tester. Small, complex shape stamping parts can be used to test the plane is very small, can not be tested on the ordinary table Rockwell hardness tester.
